The heat pump facilitates heating and cooling of air / water used in residential buildings, businesses, industrial facilities and healthcare facilities. It can be attached to emitters to such as underfloor heating and cooling systems, terminal units (such as fan coil units and water cassettes) or air handling units. Weather protection is not needed for using it for outdoor installation. It is R-410A refrigerant. The device is composed and optimizes space. It is enclosed in a housing constructed of coated metal panels which is detachable when outdoor installation is required. It comes with one or two independent refrigerant circuits, one to four high productive scroll compressors and one to four propeller fans. The heat exchanger has water-cooled brazed-plate. The microprocessor-based controller is ergonomic in the sense that many functions can be regulated manually. Communication happens with BMS via an RS-485 interface with standard (Modbus/Jbus) and optional (LON).